./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 49403db555b72e8190819e443264a1fc2796f8e39e39a8e1b1a8f1697d9e5642 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:17:00,883 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:17:01,015 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:17:01,025 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:17:01,026 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:17:01,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:17:01,080 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:17:01,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:17:01,085 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:17:01,089 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:17:01,090 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:17:01,090 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:17:01,091 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:17:01,091 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:17:01,091 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:17:01,092 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:17:01,095 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:17:01,101 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:17:01,101 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:17:01,102 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:17:01,102 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:17:01,102 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:17:01,103 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:17:01,103 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:17:01,103 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:17:01,103 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:17:01,104 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:17:01,104 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:17:01,104 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:17:01,104 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:17:01,105 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:17:01,105 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:17:01,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:17:01,105 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:17:01,106 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:17:01,106 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:17:01,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:17:01,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:17:01,113 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:17:01,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:17:01,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:17:01,114 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:17:01,117 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49403db555b72e8190819e443264a1fc2796f8e39e39a8e1b1a8f1697d9e5642 [2024-11-16 02:17:01,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:17:01,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:17:01,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:17:01,637 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:17:01,637 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:17:01,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2024-11-16 02:17:03,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:17:03,726 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:17:03,727 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2024-11-16 02:17:03,737 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13e8ec9df/4675b57ba1db4d779c4de496b1352ad9/FLAGf24d6ab98 [2024-11-16 02:17:03,754 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13e8ec9df/4675b57ba1db4d779c4de496b1352ad9 [2024-11-16 02:17:03,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:17:03,760 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:17:03,762 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:17:03,763 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:17:03,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:17:03,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:17:03" (1/1) ... [2024-11-16 02:17:03,770 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa11a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:03, skipping insertion in model container [2024-11-16 02:17:03,770 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:17:03" (1/1) ... [2024-11-16 02:17:03,793 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:17:03,973 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i[823,836] [2024-11-16 02:17:03,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:17:04,006 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:17:04,019 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i[823,836] [2024-11-16 02:17:04,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:17:04,051 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:17:04,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04 WrapperNode [2024-11-16 02:17:04,052 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:17:04,053 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:17:04,053 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:17:04,053 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:17:04,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,069 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,088 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 109 [2024-11-16 02:17:04,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:17:04,089 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:17:04,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:17:04,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:17:04,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,103 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,125 INFO L175 MemorySlicer]: Split 15 memory accesses to 2 slices as follows [2, 13]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-16 02:17:04,126 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,126 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,131 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,131 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,132 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,133 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,135 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:17:04,136 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:17:04,136 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:17:04,136 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:17:04,137 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (1/1) ... [2024-11-16 02:17:04,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:17:04,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:04,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 02:17:04,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 02:17:04,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:17:04,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:17:04,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:17:04,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 02:17:04,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:17:04,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:17:04,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:17:04,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:17:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:17:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:17:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 02:17:04,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 02:17:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 02:17:04,405 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:17:04,408 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:17:04,591 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L17: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2024-11-16 02:17:04,610 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-16 02:17:04,610 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:17:04,622 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:17:04,624 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:17:04,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:17:04 BoogieIcfgContainer [2024-11-16 02:17:04,625 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:17:04,627 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:17:04,627 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:17:04,630 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:17:04,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:17:03" (1/3) ... [2024-11-16 02:17:04,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f31a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:17:04, skipping insertion in model container [2024-11-16 02:17:04,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:17:04" (2/3) ... [2024-11-16 02:17:04,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f31a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:17:04, skipping insertion in model container [2024-11-16 02:17:04,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:17:04" (3/3) ... [2024-11-16 02:17:04,635 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2024-11-16 02:17:04,651 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:17:04,652 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:17:04,705 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:17:04,712 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a7af35c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:17:04,712 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:17:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 40 states have (on average 1.5) internal successors, (60), 41 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:17:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-16 02:17:04,723 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:04,723 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:04,724 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:04,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:04,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1591849663, now seen corresponding path program 1 times [2024-11-16 02:17:04,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:04,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929321953] [2024-11-16 02:17:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:04,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:17:04,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:04,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929321953] [2024-11-16 02:17:04,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929321953] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:04,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:17:04,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:17:04,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315968683] [2024-11-16 02:17:04,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:04,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:17:04,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:17:04,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:17:04,905 INFO L87 Difference]: Start difference. First operand has 46 states, 40 states have (on average 1.5) internal successors, (60), 41 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:04,921 INFO L93 Difference]: Finished difference Result 87 states and 128 transitions. [2024-11-16 02:17:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:17:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-16 02:17:04,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:04,930 INFO L225 Difference]: With dead ends: 87 [2024-11-16 02:17:04,930 INFO L226 Difference]: Without dead ends: 41 [2024-11-16 02:17:04,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:17:04,936 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:04,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-16 02:17:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-16 02:17:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:17:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-11-16 02:17:04,975 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 15 [2024-11-16 02:17:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:04,976 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-11-16 02:17:04,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-11-16 02:17:04,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-16 02:17:04,977 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:04,977 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:04,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:17:04,977 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:04,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:04,978 INFO L85 PathProgramCache]: Analyzing trace with hash 539894556, now seen corresponding path program 1 times [2024-11-16 02:17:04,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:04,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284534710] [2024-11-16 02:17:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:04,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:17:05,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:05,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284534710] [2024-11-16 02:17:05,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284534710] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:05,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:17:05,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 02:17:05,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903184742] [2024-11-16 02:17:05,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:05,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 02:17:05,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:05,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 02:17:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 02:17:05,046 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:05,065 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2024-11-16 02:17:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 02:17:05,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-16 02:17:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:05,067 INFO L225 Difference]: With dead ends: 80 [2024-11-16 02:17:05,067 INFO L226 Difference]: Without dead ends: 43 [2024-11-16 02:17:05,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 02:17:05,069 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:05,072 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-16 02:17:05,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-16 02:17:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:17:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2024-11-16 02:17:05,081 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 17 [2024-11-16 02:17:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:05,082 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2024-11-16 02:17:05,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2024-11-16 02:17:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-16 02:17:05,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:05,083 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:05,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 02:17:05,083 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:05,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:05,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1991234749, now seen corresponding path program 1 times [2024-11-16 02:17:05,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:05,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754824852] [2024-11-16 02:17:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:05,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:17:05,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:05,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754824852] [2024-11-16 02:17:05,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754824852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:05,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586412318] [2024-11-16 02:17:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:05,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:05,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:05,184 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:05,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 02:17:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:05,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-16 02:17:05,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:17:05,260 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:17:05,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586412318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:05,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:17:05,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-16 02:17:05,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707151089] [2024-11-16 02:17:05,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:05,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 02:17:05,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 02:17:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:17:05,262 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:05,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:05,289 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2024-11-16 02:17:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 02:17:05,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-16 02:17:05,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:05,290 INFO L225 Difference]: With dead ends: 79 [2024-11-16 02:17:05,291 INFO L226 Difference]: Without dead ends: 64 [2024-11-16 02:17:05,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:17:05,292 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 23 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:05,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 82 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-16 02:17:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2024-11-16 02:17:05,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:17:05,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-11-16 02:17:05,298 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 19 [2024-11-16 02:17:05,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:05,298 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-11-16 02:17:05,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:05,298 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-11-16 02:17:05,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-16 02:17:05,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:05,299 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:05,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 02:17:05,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:05,501 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:05,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:05,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1307543254, now seen corresponding path program 1 times [2024-11-16 02:17:05,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:05,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072598625] [2024-11-16 02:17:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:05,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:17:05,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:05,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072598625] [2024-11-16 02:17:05,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072598625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:05,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129485726] [2024-11-16 02:17:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:05,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:05,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:05,617 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:05,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 02:17:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:05,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-16 02:17:05,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:17:05,734 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:17:05,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129485726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:05,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:17:05,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-16 02:17:05,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401819774] [2024-11-16 02:17:05,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:05,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 02:17:05,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:05,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 02:17:05,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:17:05,736 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:05,783 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2024-11-16 02:17:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 02:17:05,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-16 02:17:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:05,785 INFO L225 Difference]: With dead ends: 86 [2024-11-16 02:17:05,785 INFO L226 Difference]: Without dead ends: 50 [2024-11-16 02:17:05,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:17:05,786 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:05,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 88 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-16 02:17:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-16 02:17:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:17:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2024-11-16 02:17:05,794 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 22 [2024-11-16 02:17:05,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:05,795 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2024-11-16 02:17:05,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2024-11-16 02:17:05,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-16 02:17:05,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:05,796 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:05,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 02:17:05,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 02:17:05,997 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:05,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:05,998 INFO L85 PathProgramCache]: Analyzing trace with hash -489408105, now seen corresponding path program 1 times [2024-11-16 02:17:05,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:05,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436865295] [2024-11-16 02:17:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:05,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:17:06,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:06,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436865295] [2024-11-16 02:17:06,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436865295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:06,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105788429] [2024-11-16 02:17:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:06,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:06,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:06,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:06,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:17:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:06,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-16 02:17:06,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:17:06,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:17:06,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105788429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:06,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:06,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-16 02:17:06,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49870213] [2024-11-16 02:17:06,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:06,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 02:17:06,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:06,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 02:17:06,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-16 02:17:06,191 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:06,248 INFO L93 Difference]: Finished difference Result 100 states and 128 transitions. [2024-11-16 02:17:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 02:17:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-16 02:17:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:06,249 INFO L225 Difference]: With dead ends: 100 [2024-11-16 02:17:06,249 INFO L226 Difference]: Without dead ends: 56 [2024-11-16 02:17:06,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-16 02:17:06,251 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:06,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 244 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-16 02:17:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-16 02:17:06,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:17:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-11-16 02:17:06,257 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 22 [2024-11-16 02:17:06,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:06,258 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-11-16 02:17:06,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-11-16 02:17:06,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-16 02:17:06,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:06,259 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:06,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 02:17:06,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:06,463 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:06,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:06,464 INFO L85 PathProgramCache]: Analyzing trace with hash -260219052, now seen corresponding path program 2 times [2024-11-16 02:17:06,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:06,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464812543] [2024-11-16 02:17:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:06,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:17:06,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:06,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464812543] [2024-11-16 02:17:06,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464812543] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:06,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:17:06,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 02:17:06,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113696798] [2024-11-16 02:17:06,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:06,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 02:17:06,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 02:17:06,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 02:17:06,569 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:06,666 INFO L93 Difference]: Finished difference Result 126 states and 163 transitions. [2024-11-16 02:17:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 02:17:06,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-16 02:17:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:06,668 INFO L225 Difference]: With dead ends: 126 [2024-11-16 02:17:06,668 INFO L226 Difference]: Without dead ends: 85 [2024-11-16 02:17:06,668 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 02:17:06,669 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:06,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:17:06,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-16 02:17:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2024-11-16 02:17:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:17:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-11-16 02:17:06,676 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 28 [2024-11-16 02:17:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:06,676 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-11-16 02:17:06,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-11-16 02:17:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-16 02:17:06,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:06,677 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:06,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 02:17:06,678 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:06,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:06,678 INFO L85 PathProgramCache]: Analyzing trace with hash 892254869, now seen corresponding path program 1 times [2024-11-16 02:17:06,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:06,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484349864] [2024-11-16 02:17:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:06,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-16 02:17:06,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:06,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484349864] [2024-11-16 02:17:06,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484349864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:06,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:17:06,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 02:17:06,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924791302] [2024-11-16 02:17:06,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:06,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 02:17:06,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:06,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 02:17:06,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 02:17:06,785 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:06,830 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2024-11-16 02:17:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 02:17:06,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-16 02:17:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:06,832 INFO L225 Difference]: With dead ends: 122 [2024-11-16 02:17:06,832 INFO L226 Difference]: Without dead ends: 81 [2024-11-16 02:17:06,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 02:17:06,833 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:06,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 92 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-16 02:17:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2024-11-16 02:17:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:17:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2024-11-16 02:17:06,845 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 32 [2024-11-16 02:17:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:06,847 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2024-11-16 02:17:06,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2024-11-16 02:17:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-16 02:17:06,850 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:06,850 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:06,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 02:17:06,850 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:06,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash -930505712, now seen corresponding path program 1 times [2024-11-16 02:17:06,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:06,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330729125] [2024-11-16 02:17:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:06,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:17:06,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:06,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330729125] [2024-11-16 02:17:06,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330729125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:06,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910849473] [2024-11-16 02:17:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:06,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:06,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:06,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:06,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:17:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:07,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 02:17:07,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:17:07,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:17:07,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910849473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:07,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:07,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-16 02:17:07,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019083440] [2024-11-16 02:17:07,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:07,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 02:17:07,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:07,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 02:17:07,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-16 02:17:07,143 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:07,163 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2024-11-16 02:17:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 02:17:07,164 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-16 02:17:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:07,165 INFO L225 Difference]: With dead ends: 148 [2024-11-16 02:17:07,165 INFO L226 Difference]: Without dead ends: 86 [2024-11-16 02:17:07,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-16 02:17:07,166 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:07,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 155 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:07,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-16 02:17:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-16 02:17:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 81 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:17:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2024-11-16 02:17:07,173 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 33 [2024-11-16 02:17:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:07,173 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2024-11-16 02:17:07,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2024-11-16 02:17:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-16 02:17:07,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:07,175 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:07,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 02:17:07,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:07,376 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:07,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:07,376 INFO L85 PathProgramCache]: Analyzing trace with hash 824695318, now seen corresponding path program 2 times [2024-11-16 02:17:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282041826] [2024-11-16 02:17:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:17:07,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:07,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282041826] [2024-11-16 02:17:07,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282041826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:07,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58183870] [2024-11-16 02:17:07,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:17:07,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:07,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:07,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:07,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 02:17:07,769 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-16 02:17:07,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:07,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 02:17:07,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:07,831 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2024-11-16 02:17:07,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 15 [2024-11-16 02:17:07,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-11-16 02:17:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-16 02:17:07,908 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:17:07,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58183870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:17:07,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:17:07,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2024-11-16 02:17:07,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976667371] [2024-11-16 02:17:07,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:17:07,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 02:17:07,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:07,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 02:17:07,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2024-11-16 02:17:07,911 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:07,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:07,999 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2024-11-16 02:17:07,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 02:17:08,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-16 02:17:08,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:08,001 INFO L225 Difference]: With dead ends: 97 [2024-11-16 02:17:08,003 INFO L226 Difference]: Without dead ends: 94 [2024-11-16 02:17:08,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-11-16 02:17:08,004 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 4 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:08,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 214 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:17:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-16 02:17:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2024-11-16 02:17:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 87 states have internal predecessors, (104), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-16 02:17:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2024-11-16 02:17:08,019 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 45 [2024-11-16 02:17:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:08,019 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2024-11-16 02:17:08,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:17:08,020 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2024-11-16 02:17:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-16 02:17:08,026 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:08,026 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:08,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 02:17:08,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:08,231 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:08,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:08,231 INFO L85 PathProgramCache]: Analyzing trace with hash 98001752, now seen corresponding path program 1 times [2024-11-16 02:17:08,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:08,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046085078] [2024-11-16 02:17:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:08,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:08,507 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-16 02:17:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 02:17:08,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:08,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046085078] [2024-11-16 02:17:08,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046085078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:08,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705890116] [2024-11-16 02:17:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:08,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:08,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:08,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:08,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 02:17:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:08,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 02:17:08,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-16 02:17:08,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 02:17:09,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705890116] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:09,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:09,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-16 02:17:09,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496839734] [2024-11-16 02:17:09,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:09,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-16 02:17:09,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:09,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-16 02:17:09,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-16 02:17:09,125 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:17:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:09,230 INFO L93 Difference]: Finished difference Result 186 states and 235 transitions. [2024-11-16 02:17:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-16 02:17:09,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2024-11-16 02:17:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:09,235 INFO L225 Difference]: With dead ends: 186 [2024-11-16 02:17:09,235 INFO L226 Difference]: Without dead ends: 117 [2024-11-16 02:17:09,236 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-16 02:17:09,241 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:09,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 403 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:17:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-16 02:17:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-16 02:17:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 111 states have internal predecessors, (128), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-16 02:17:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2024-11-16 02:17:09,262 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 53 [2024-11-16 02:17:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:09,262 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2024-11-16 02:17:09,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:17:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2024-11-16 02:17:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-16 02:17:09,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:09,264 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:09,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 02:17:09,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:09,465 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:09,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash -306902940, now seen corresponding path program 2 times [2024-11-16 02:17:09,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:09,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337655719] [2024-11-16 02:17:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:09,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:10,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-11-16 02:17:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 2 proven. 506 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 02:17:10,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:10,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337655719] [2024-11-16 02:17:10,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337655719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:10,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249280106] [2024-11-16 02:17:10,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:17:10,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:10,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:10,491 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:10,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 02:17:10,602 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:17:10,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:10,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-16 02:17:10,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-16 02:17:10,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 2 proven. 506 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 02:17:11,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249280106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:11,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:11,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-16 02:17:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134329499] [2024-11-16 02:17:11,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:11,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-16 02:17:11,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-16 02:17:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-16 02:17:11,577 INFO L87 Difference]: Start difference. First operand 117 states and 136 transitions. Second operand has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:17:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:11,644 INFO L93 Difference]: Finished difference Result 234 states and 295 transitions. [2024-11-16 02:17:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-16 02:17:11,645 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 77 [2024-11-16 02:17:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:11,646 INFO L225 Difference]: With dead ends: 234 [2024-11-16 02:17:11,646 INFO L226 Difference]: Without dead ends: 165 [2024-11-16 02:17:11,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-16 02:17:11,648 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:11,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 238 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:17:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-16 02:17:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-11-16 02:17:11,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 158 states have (on average 1.1139240506329113) internal successors, (176), 159 states have internal predecessors, (176), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-16 02:17:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 184 transitions. [2024-11-16 02:17:11,656 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 184 transitions. Word has length 77 [2024-11-16 02:17:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:11,656 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 184 transitions. [2024-11-16 02:17:11,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:17:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 184 transitions. [2024-11-16 02:17:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-16 02:17:11,658 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:11,658 INFO L215 NwaCegarLoop]: trace histogram [47, 46, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:11,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 02:17:11,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:11,862 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:11,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:11,863 INFO L85 PathProgramCache]: Analyzing trace with hash 654976636, now seen corresponding path program 3 times [2024-11-16 02:17:11,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:11,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020909020] [2024-11-16 02:17:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:11,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:14,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2024-11-16 02:17:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2169 backedges. 2 proven. 2162 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 02:17:14,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:14,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020909020] [2024-11-16 02:17:14,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020909020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:14,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448283340] [2024-11-16 02:17:14,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:17:14,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:14,013 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:14,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 02:17:14,116 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 02:17:14,117 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:14,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 02:17:14,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2169 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2167 trivial. 0 not checked. [2024-11-16 02:17:14,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2169 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2165 trivial. 0 not checked. [2024-11-16 02:17:14,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448283340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:14,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:14,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5, 5] total 55 [2024-11-16 02:17:14,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322935713] [2024-11-16 02:17:14,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:14,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-16 02:17:14,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:14,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-16 02:17:14,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1195, Invalid=1775, Unknown=0, NotChecked=0, Total=2970 [2024-11-16 02:17:14,303 INFO L87 Difference]: Start difference. First operand 165 states and 184 transitions. Second operand has 55 states, 55 states have (on average 2.6) internal successors, (143), 55 states have internal predecessors, (143), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:17:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:14,616 INFO L93 Difference]: Finished difference Result 303 states and 372 transitions. [2024-11-16 02:17:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-16 02:17:14,616 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.6) internal successors, (143), 55 states have internal predecessors, (143), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2024-11-16 02:17:14,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:14,618 INFO L225 Difference]: With dead ends: 303 [2024-11-16 02:17:14,618 INFO L226 Difference]: Without dead ends: 234 [2024-11-16 02:17:14,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1244, Invalid=2416, Unknown=0, NotChecked=0, Total=3660 [2024-11-16 02:17:14,620 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 113 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:14,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 311 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:17:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-16 02:17:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 207. [2024-11-16 02:17:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 198 states have (on average 1.1262626262626263) internal successors, (223), 200 states have internal predecessors, (223), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 02:17:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 235 transitions. [2024-11-16 02:17:14,629 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 235 transitions. Word has length 125 [2024-11-16 02:17:14,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:14,630 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 235 transitions. [2024-11-16 02:17:14,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.6) internal successors, (143), 55 states have internal predecessors, (143), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:17:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 235 transitions. [2024-11-16 02:17:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-16 02:17:14,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:14,632 INFO L215 NwaCegarLoop]: trace histogram [48, 47, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:14,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 02:17:14,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-16 02:17:14,833 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:14,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:14,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1737921321, now seen corresponding path program 4 times [2024-11-16 02:17:14,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:14,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301999741] [2024-11-16 02:17:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:14,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:16,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-11-16 02:17:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2293 backedges. 2 proven. 2256 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-16 02:17:16,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:16,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301999741] [2024-11-16 02:17:16,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301999741] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:16,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110730053] [2024-11-16 02:17:16,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:17:16,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:16,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:16,790 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:16,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 02:17:16,974 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:17:16,974 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:17:16,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-16 02:17:16,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:17:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2293 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-16 02:17:17,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:17:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2293 backedges. 2 proven. 2256 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-16 02:17:19,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110730053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:17:19,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:17:19,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2024-11-16 02:17:19,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365091350] [2024-11-16 02:17:19,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:17:19,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-16 02:17:19,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:17:19,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-16 02:17:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2024-11-16 02:17:19,995 INFO L87 Difference]: Start difference. First operand 207 states and 235 transitions. Second operand has 99 states, 99 states have (on average 2.2525252525252526) internal successors, (223), 99 states have internal predecessors, (223), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:17:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:17:20,204 INFO L93 Difference]: Finished difference Result 414 states and 518 transitions. [2024-11-16 02:17:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-16 02:17:20,206 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.2525252525252526) internal successors, (223), 99 states have internal predecessors, (223), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 139 [2024-11-16 02:17:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:17:20,208 INFO L225 Difference]: With dead ends: 414 [2024-11-16 02:17:20,208 INFO L226 Difference]: Without dead ends: 305 [2024-11-16 02:17:20,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2024-11-16 02:17:20,211 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:17:20,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 382 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:17:20,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-16 02:17:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2024-11-16 02:17:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 296 states have (on average 1.0844594594594594) internal successors, (321), 298 states have internal predecessors, (321), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 02:17:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 333 transitions. [2024-11-16 02:17:20,222 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 333 transitions. Word has length 139 [2024-11-16 02:17:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:17:20,225 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 333 transitions. [2024-11-16 02:17:20,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.2525252525252526) internal successors, (223), 99 states have internal predecessors, (223), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-16 02:17:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 333 transitions. [2024-11-16 02:17:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2024-11-16 02:17:20,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:17:20,228 INFO L215 NwaCegarLoop]: trace histogram [97, 96, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:17:20,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-16 02:17:20,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-16 02:17:20,432 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:17:20,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:17:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1804683112, now seen corresponding path program 5 times [2024-11-16 02:17:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:17:20,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137843149] [2024-11-16 02:17:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:17:20,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:17:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:25,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2024-11-16 02:17:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:17:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9349 backedges. 2 proven. 9312 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-16 02:17:25,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:17:25,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137843149] [2024-11-16 02:17:25,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137843149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:17:25,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639029155] [2024-11-16 02:17:25,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:17:25,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:17:25,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:17:25,848 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:17:25,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process